It’s an aerial root. You can tuck it back into the pot for extra stability or just let it grow where it wants. I usually tuck mine back into the soil. New growth will come out of a sheath on the mother plant like this
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Anonymous8w
root
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Anonymous8w
It’s an Arial root. Monsters are aroids. Meaning in nature they anchor themselves to trees and grow up the side if said tree. Arial roots help support/anchor the plant as it grows. It’s completely normal.